Lean Duplex 2304 (UNS S32304)

SPECIFICATIONS: GRADE Lean Duplex | UNS S32304 | ASTM/ASME A240 | Werkstoff 1.4362

Lean duplex 2304 is a 23‰ Cr, 4‰ Nickel, Mo free duplex stainless steel (23.04). We hold stock of duplex alloys in plate, sheet, and bar from our warehouse in the CN. We often meet specialist alloy profiling requirements and are a global supplier.

The alloy lean duplex 2304 has similar corrosion resistance properties to 316L. Furthermore, its mechanical properties i.e. yield strength, are twice those of 304/316 austenitic grades. This allows the designer to save weight, particularly for properly designed pressure vessel applications.

The alloy is particularly suitable for applications covering the -50°C/+300°C (-58°F/572°F) temperature range. Lower temperatures may also be considered, but need some restrictions, particularly for welded structures.

With its duplex microstructure, low nickel and high chromium contents, the alloy has improved stress corrosion resistance properties compared to 304 and 316 austenitic grades.

Typical values (weight %)CCrNiMoNOthers0.0202340.20.1S = 0.001PREN (‰Cr+3.3‰Mo+16‰N) ≥ 24Tensile properties (minimum values)°CRp 0.2 MPaRp 1.0 MPaRm MPa°FYS 0.2‰ KSIYS 1.0‰ KSIUTS KSIElongation ‰20400440600685864872510033036557021248538325200280310530392414577203023026049057233387120

Values obtained for hot rolled plates (th ≤ 50mm). Lean duplex 2304 grade must not be used for a long time at temperatures higher than 300°C &40;572°F), where precipitation hardening phenomenon occurs.Hardness values (KCV minimum values)Temp.-50°C+20°C-60°F+70°FSingle75 J/cm²90 J/cm²54 ft.lbs65 ft.lbsAverage (5)90 J/cm²150 J/cm²65 ft.lbs87 ft.lbsHardness values (KCV minimum values)Average (5)HV10 180-230HB : 180-230HRC ≤ 20

Copper additions may be considered as lean duplex 2304 Cu may be hardened by heat treatment to improve abrasion-corrosion resistance properties.

Density: 7,800 kg/ – 0.28 lb/in3Interval temper °CThermal expansion αx10-6K-1°CResistivity (µΩ cm)Thermal conductivity (W.m-1.K-1)Specific heat (J.kg-1.K-1)Young modulus E (GPa)Shear modulus G (GPa)20-100132080174502007510092185001907320-20013.5200100195301607020-300143001052056017067